- Appropriate coefficient of friction for most manual transmission synchronizers (other's synthetic gear oils are often too slippery for proper synchro engagement)- Red Line offers lubricants to pinpoint nearly every transmission application- MTL, MT-85 & MT-90 are not for use in differentials with hypoid gears- Excellent gear and synchro protection, balanced slipperiness for easier shifting in cold climates- Excellent for high- and low-mile transmissions- Compatibale with petroleums and other synthetics- Designed for transmissions and transaxles - helps to slow synchros for easier shifting across a broad temperature range- Popular in Ferrari, Porsche and Subaru transaxles- Muscle car applications like Ford Top Loader, Borg-Warner T-10 and Super T-10, and Muncie transmissions- Contains extreme pressure additives like our 75W90 GL-5 oil, but lacks friction modifiers to balance slipperiness- Improved copper corrosion protection to prolong synchro life- Helps with lock-up on weak limited-slip differentials-compatible with Red Line Limited Slip Friction Modifier for tuning slippage- Also used with clutch-type LSDs in racing for maximum lock up- Recommended for API GL-5, GL-6, MT-1, MIL-L-2105E and SAE J2360